Université de Limoges, Groupement de Recherche Eau Sol Environnement (EA 4330), Faculté des Sciences et Techniques, 123 Av. Albert Thomas, 87 060 Limoges, France.
Bioresour Technol. 2011 Jul;102(14):7124-30. doi: 10.1016/j.biortech.2011.04.058. Epub 2011 Apr 27.
This work characterises the mineral fraction of EPS extracts obtained using eight different methods from two activated sludges by total mineral content determination, Fourier Transformed Infrared spectrometry and with scanning electron microscopy coupled with an EDX probe. Despite EPS dialysis, the EPS extracts displayed a mineral fraction between 2% and 40% of the EPS dry weight depending on the extraction method used. The main mineral elements found in the EPS extract were Ca, Mg, Na, K, Al, Fe, Mn, P, Si and S, but their contents were strongly affected by the extraction method used. Some of the minerals are associated with the organic molecules within the EPS. The presence of mineral particles of various compositions and structures (clays, quartz or carbonate) in the EPS extract with a wide range in size was clearly demonstrated. Moreover, the association of metallic elements with the mineral particles in the EPS extract was highlighted.
本工作通过总矿物质含量测定、傅里叶变换红外光谱和扫描电子显微镜结合 EDX 探针，对使用 8 种不同方法从两种活性污泥中获得的 EPS 提取物的矿物质部分进行了描述。尽管对 EPS 进行了透析，但 EPS 提取物中的矿物质部分仍占 EPS 干重的 2%至 40%，具体取决于所使用的提取方法。在 EPS 提取物中发现的主要矿物质元素有 Ca、Mg、Na、K、Al、Fe、Mn、P、Si 和 S，但它们的含量受到提取方法的强烈影响。一些矿物质与 EPS 中的有机分子有关。明显证明了 EPS 提取物中存在各种组成和结构的矿物质颗粒（粘土、石英或碳酸盐），且大小范围很广。此外，还强调了 EPS 提取物中金属元素与矿物质颗粒的结合。
